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F. DRR. GAS AND PETROLEUM MOTOR.

No. 442,248. Petented Dee. 9,1890.

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F. DRR. GAS AND PETROLEUM MOTOR..

No. 442,248. Patented Deo. 9, 1890.

umu.` msnmsfou o c UNITED STATES PATENT OFFICE.

FRITZ DI'RR, or MUNICH, GERMANY.

GAS AND PETROLEUM MOTOR.

SPECIFICATION forming part of Letters Patent No. 442,218, dated December 9, 1890.

Application filed April 15, 1890. Serial No, 348,058. (No model.) Patented in Germany September 24, 1889, No. 48,839, and in Belgium December 3l, 1889,11'0. 88,839.

To @ZZ whom t may concern.-

Be it known that I, FRITZ DRR, residing at Munich, Bavaria, German Empire, have invented a new and useful Improvement in Gas and Petroleum Motors, (for which I have ob tained a patent in Germany, No. 18,339, dated September 24, 1889, and in Belgium, NoSSJQ, dated December 31,1889,) ot which the following is a specification.

This invention relates to an improved gas and petroleum motor; and it consists in the various features of improvement more fully pointed out in the claims.

In the accompanying drawings, Figure l is a vertical central section ot' my improved motor. Fig. 2 is a section of a modification.

The letter g represents the gas-inlet, which is opened by the raising of the spring-valve g', to the lower end ot which is pivoted a rod g2.

n is the air-inlet; Z, the inlet-valve; '/1, the exhaust; Zt, a bent lever for moving the fuse slide or valve, and p the regulating-pendulum.

1j is a cam or disk mounted upon the powershaft u and operating the air and gas inlet, the exhaust-valve, fuse-slide, and the regulating-pendulum, by means of three projections fy y2 gf; and a screw-bolt 5, in the following manner: The projection y oscillates a lever ZZ', which controls the gas-valve g and the inlet-valve Z, in manner hereinafter described. The screw-bolt z strikes against thc bent lever 7i', and moves the fuse-slide by spring f. The projection y? (placed out ot line with proj ection g1/") oscillates a lever h2, that operates the exhaust-valve. The projection y strikes against the roller R of a pendulum p,and throws the pendulum away from the cam, the amount of motion of the pendulum depending upon the velocity with which the cam revolves. The pendulum returns to the cam by its own gravity. To the pendulum there is secured an armo, that engages in the state of rest the pivoted rod g2 of the gas-valve g and presses the same against the lever Zt. This lever is provided with a reduced end f?, that enters a socket in rod g2, when the rod is pressed against the lever. XV'hen the rod g2 is thus engaged by lever 7L the rocking of the lever (by cam y) will cause a motion of valve g; but if the rod g2 is out of engagement with the lever the motion of the latter will not be transmitted to the valve. Then the pendulum l) and the arm a are thrown outward to release rod g2, a weight y on the latter presses such rod out-ward also and disengages it from lever 7i. The return motion of the pendulum causes a corresponding motion of rod g2 and a re-engagement between such rod and lever h. The apparatus should be so set that the pendulum returns a moment before the lever h' is oscillated to raise 'the valve. If the motion of the machine is such that the pendulum is thrown out too far, the lever ZL will rock before the rod g2has been returned to it, and thus the valve will not be raised. In this way gas will not be admitted until the speed of the machine has been reduced to the normal state.

In Fig. 2 the velocity of the motor is regulated by temporarily keeping open an airvalve of the cylinder and thus reducing the air-pressure. The projection g3 of cam-disk y strikes against the roller R of the pendulum p, weighted at C. This pendulum carries a bent arm p', provided with set-screw S. V is the airvalve at one end of the cylinder. The valve-stem fr of valve V is notched, and may be engaged byan elbow-lever IV, placed opposite screw S.

The regular oscillating motion of pendulum p will not disturb the lever W'. It the motion of the pendulum unduly increases, the screw S will strike against lever XV and throw the same into engagement with the notched valve-stem :c a moment before the valve is to close. Thus the valve is held up and the air is discharged from the cylinder. At the return motion of the piston the valve is again raised and the elbow-lever IV resumes it normal position by the weight ot' its lower arm.

1. The combination of disk y, having projections y y2 U3, and screw e, with lever ZL', operating gas-valve g', and inlet-valve Z, bent lever Zz, operating the fuse-slide,lever h2, op-

erating the exhaust-valve, and a pendu-lmnp, controlling thev gas-supply substantially as specified.

2. The combination of disk y, having nose g3, with pendulum p, engaged by said nose and adapted to cause a momentary engagement between the valve anda valve checking or operating mechanism, substantially as specified.

3. The combination of disk y, having projections y ya, With lever h', valve g., and piv- Aoted rod g2, engaged by lever h', `and with 

